Protective shield for use at the bite of rollers for paper and textile calenders

ABSTRACT

A protective shield for use at the bite of rollers of paper and textile calenders, which consists of a hollow longitudinal member of triangular cross section formed by angle-shaped plate means connected to each other, said hollow longitudinal member containing a filling of hard foam synthetic material.

[ 1 May 30, 1972 United States Patent Schlunke References Cited UNITEDSTATES PATENTS 54] PROTECTIVE SHIELD FOR USE AT THE BITE OF ROLLERS FORPAPER AND TEXTILE CALENDERS wk U 1,925,364 9/1933 3,256,395 6/1966 Grauet al. 3,498,217 3/1970 [72] Inventor: Jurgen Schlunke, Krefeld, Germany[22] Filed: Jan. 11, 1971 Primary Examiner-Peter F eldmanAttorney-Walter Becker [21] Appl. No.:

ABSTRACT A protective shield for use at the bite of rollers of paper andtextile calenders, which consists of a hollow longitudinal member oftriangular cross section formed by angle-shaped plate means connected toeach other, said hollow longitudinal member containing a filling of hardfoam synthetic material.

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6 Claims, 2 Drawing figures PROTECTIVE SHIELD FOR USE AT THE BITE OFROLLERS FOR PAPER AND TEXTILE CALENDERS The present invention relates toa protective shield at the bite of papers for paper or textile calendersand comprises a longitudinally extending box made up of angle profilesof thin metal sheet material.

Protective shields of this type are for safety reasons provided on allcalenders having rotating rollers, and more specifically, are installedin front of the bites of the rollers. Protective shields of this typeare intended to prevent the operator from accidentally getting his handsinto the gap between the rotating rollers. Heretofore known protectiveshields of the type involved comprise at least one angular metal profilewhich extends parallel to the roller axis in front of the roller gap andis laterally connected to the calender stand or to the housing whichcarries the bearings for the rollers. With large calenders having aroller width up to meters, the correspondingly long protective angleshave to be reinforced by providing intermediate webs which are eitherwelded 'on, screwed on, or riveted on. Moreover, the protective shieldmay, in a manner known per se, be made up of metal profiles so as toform a closed housing and may be welded, screwed, or riveted together sothat a satisfactory stability of the protective shield will be obtained.

inasmuch as the metal profiles which form the protective shield will, inview of the great length of said shield, have relatively great wallthicknesses for reason of stability, the protective shield becomesrelatively heavy. When employing light metal, only the requirementconcerning a sufficient stability of the protective shield could besatisfactorily met. These protective shields, however, have thetendency, in view of foreign excitement by the machine, to producerelatively strong oscillations.

it is, therefore, an object of the present invention to provide aprotective shield which can also be made in great length so that it willhave a good stability and it will be substantially free fromoscillations.

These objects and other objects and advantages of the invention willappear more clearly from the following specification, in connection withthe accompanying drawing, in which:

FIG. 1 illustrates a cross section through a protective shield accordingto the invention.

FIG. 2 is a longitudinal view of the protective shield according to theinvention.

The protective shield according to the present invention for use at thebite of rollers for paper and textile calenders is characterized by abox composed of angle profiles of thin sheet metal, which box is filledwith hard foam synthetic material (Hart-schaumkunstofi).

The metal profiles which form the box may, in conformity with thepreferred design of the protective shield according to the invention, beperforated in order to make them lighter. The metal profiles which forma box and have been composed of sections by welding, riveting, orscrewing, will impart upon the protective shield a sufficient stabilityeven if the box is rather long. The foaming of the interior of the boxwith synthetic materials dampens the tendency of the protective shieldto oscillate or vibrate in view of the foreign excitement by themachine.

Referring now to the drawing in detail, the protective shield 1 iscomposed of an outer angle profile 2 which is welded to an inner angleprofile 3 at 4 and along the leg ends. In this way there will beobtained a box of triangular transverse section. This box mayadditionally be reinforced by the welding-in of intermediate webs 5 and6.

The ends of the protective shield l have supports 7 welded thereto bymeans of which the protective shield l is mounted on the calender stand.For purposes of obtaining a saving in the weight, the angle profiles 2and 3 and, if desired, the intermediate webs 5 and 6 may be punchedthrough or perforated as indicated at 8.

lnstead of designing the protective shield l with a triangular crosssection, it is, of course, possible to provide the protective shieldwith any other suitable contour. The intermediate webs 5 and 6 may also,in a different way than that depicted in the drawing, be arranged andassembled or, if desired, may be completely omitted. lnstead of theconnection of the metal profiles 2 and 3 and intermediate webs 5 and 6by welding, any other connecting method, for instance, riveting orscrewing together of the elements may be selected. As material for theangle profiles 2 and 3, and intermediate webs 5 and 6, light or heavymetal may be employed in conformity with the specific requirementsinvolved.

As hard foam synthetic material anystandard material of this type may beused. For instance, ureaforrnaldehyde and polyvinyl formaldehyde foamplastics may be employed.

It is, of course, to be understood that the present invention is, by nomeans, limited to the particular structure shown in the drawing, butalso comprises any modifications within the scope of the appendedclaims.

What I claim is:

1. A protective shield for use at the bite of rollers of paper andtextile calenders, which includes: first plate means comprising at leasttwo longitudinal plate sections forming an angle with each other, secondplate means likewise comprising at least two longitudinal plate sectionsforming with each other an angle and having their free longitudinalmarginal portions firmly connected to the free longitudinal marginalportions of the respective adjacent plate sections of said first platemeans so as to confine therewith a longitudinal shield structure oftriangular cross-section, and synthetic material of hard foam substancewithin said longitudinal structure.

2. A protective shield according to claim 1, in which said first andsecond plate means are of metal.

3. A protective shield according to claim 1, in which at least one ofsaid first and second plate means is perforated.

4. A protective shield according to claim 1, which includes reinforcingweb means bracing the plate sections of said first plate means relativeto each other. 7

5. A protective shield according to claim 1, in which the angle definedby the plate sections of said first plate means is less than the angledefined by the plate sections of said second plate means.

6. A protective shield according to claim 1, which includes supportingmeans at both ends of said longitudinal structure of triangularcross-section for mounting said shield structure to a calender stand.

PO-W5O UNITED STATES PATENT OFFICE 5 69 CERTIFICATE OF CORRECTION PatentNo. 3 65 846 Dated y 30 1972 lnventofls) Jurgen Schlunke It is certifiedthat error appears in the above-identified patent and that said LettersPatent are hereby corrected as shown below:

On the cover sheet insert [73] Assignee Joh. Kleinewefers Sohne Signedand sealed this 27th day of February 1973.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. ROBERT GOTTSCI-IALK Attesting Officer Commissionerof Patents

1. A protective shield for use at the bite of rollers of paper andtextile calenders, which includes: first plate means comprising at leasttwo longitudinal plate sections forming an angle with each other, secondplate means likewise comprising at least two longitudinal plate sectionsforming with each other an angle and having their free longitudinalmarginal portions firmly connected to the free longitudinal marginalportions of the respective adjacent plate sections of said first platemeans so as to confine therewith a longitudinal shield structure oftriangular cross-section, and synthetic material of hard foam substancewithin said longitudinal structure.
 2. A protective shield according toclaim 1, in which said first and second plate means are of metal.
 3. Aprotective shield according to claim 1, in which at least one of saidfirst and second plate means is perforated.
 4. A protective shieldaccording to claim 1, which includes reinforcing web means bracing theplate sections of said first plate means relative to each other.
 5. Aprotective shield according to claim 1, in which the angle defined bythe plate sections of said first plate means is less than the angledefined by the plate sections of said second plate means.
 6. Aprotective shield according to claim 1, which includes supporting meansat both ends of said longitudinal structure of triangular cross-sectionfor mounting said shield structure to a calender stand.